public OoxTransform(OoxTransform outer, OoxTransform inner)
{
// Get the Bounding box of the most inner transformation
_x = inner.X;
_y = inner.Y;
_cx = inner.CX;
_cy = inner.CY;
// Now combine all transformations (5.7.4, "Render a simple shape inside a group hierarchy", steps 1, 2, 3)
_rot = Normalize(outer._rot + inner._rot);
_flipH = outer._flipH * inner._flipH;
_flipV = outer._flipV * inner._flipV;
_scaleX = outer._scaleX * inner._scaleX;
_scaleY = outer._scaleY * inner._scaleY;
TransformationMatrix m = outer._transform * inner._transform; // Note : the center should be invariant by inner._transform...
// Calculate the coordinates of the new Center (5.7.4, "Render a simple shape inside a group hierarchy", step 4)
PointCoordinates originalCenter = new PointCoordinates(_x + _cx / 2.0, _y + _cy / 2.0);
PointCoordinates newCenter = m.Transform(originalCenter);
// Now calculate the target "Bounding box"
double newCx = _cx * _scaleX;
double newCy = _cy * _scaleY;
double newX = newCenter.X - newCx / 2.0;
double newY = newCenter.Y - newCy / 2.0;
// And finally compute the transformation matrix...
CreateMatrix(_x, _y, _cx, _cy, newX, newY, newCx, newCy, _rot, _flipH, _flipV);
}
public void Transform(double x, double y, out double newX, out double newY)
{
PointCoordinates sourcePt = new PointCoordinates(x, y);
PointCoordinates newPt = _transform.Transform(sourcePt);
newX = newPt.X;
newY = newPt.Y;
}
public PointCoordinates Transform(PointCoordinates pt)
{
return(new PointCoordinates(_v11 * pt.X + _v12 * pt.Y + _v13 * pt.Z,
_v21 * pt.X + _v22 * pt.Y + _v23 * pt.Z,
_v31 * pt.X + _v32 * pt.Y + _v33 * pt.Z));
}